Domain Wall Automotion in Three-Dimensional Magnetic Helical Interconnectors

Luka Skoric; Claire Donnelly; Aurelio Hierro-Rodriguez; Miguel A. Cascales Sandoval; Sandra Ruiz-Gómez; Michael Foerster; Miguel A. Niño; Rachid Belkhou; Claas Abert; Dieter Suess; Amalio Fernández-Pacheco

doi:10.1021/acsnano.1c10345

Titel

Domain Wall Automotion in Three-Dimensional Magnetic Helical Interconnectors

Autor*in

Luka Skoric

Department of Physics, Cavendish Laboratory, University of Cambridge

Claire Donnelly

Department of Physics, Cavendish Laboratory, University of Cambridge

Aurelio Hierro-Rodriguez

SUPA, School of Physics and Astronomy, University of Glasgow

... show all

Abstract

The fundamental limits currently faced by traditional computing devices necessitate the exploration of ways to store, compute, and transmit information going beyond the current CMOS-based technologies. Here, we propose a three-dimensional (3D) magnetic interconnector that exploits geometry-driven automotion of domain walls (DWs), for the transfer of magnetic information between functional magnetic planes. By combining state-of-the-art 3D nanoprinting and standard physical vapor deposition, we prototype 3D helical DW conduits. We observe the automotion of DWs by imaging their magnetic state under different field sequences using X-ray microscopy, observing a robust unidirectional motion of DWs from the bottom to the top of the spirals. From experiments and micromagnetic simulations, we determine that the large thickness gradients present in the structure are the main mechanism for 3D DW automotion. We obtain direct evidence of how this tailorable magnetic energy gradient is imprinted in the devices, and how it competes with pinning effects that are due to local changes in the energy landscape. Our work also predicts how this effect could lead to high DW velocities, reaching the Walker limit during automotion. This work demonstrates a possible mechanism for efficient transfer of magnetic information in three dimensions.

Stichwort

spintronics3D nanofabricationX-ray microscopydomain wallsautomotion

Objekt-Typ

journal article

Sprache

Englisch [eng]

Persistent identifier

phaidra.univie.ac.at/o:2116544

DOI

10.1021/acsnano.1c10345

Erschienen in

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